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sqlite3.oo1.OpfsDb: default to journal_mode=persist, as current tests show it to be marginally faster than truncate/delete in Chrome v109. Also increase default busy_timeout from 2 seconds to 3, admittedly on a whim.

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FossilOrigin-Name: d0c8fa30a31c691bc1be5e98d806eeb1e23a8fc6cd54d87e5c1b720aa936e707
This commit is contained in:
stephan
2022-11-29 18:28:40 +00:00
parent 6e86d5569d
commit 72ee096775
3 changed files with 13 additions and 11 deletions
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10
ext/wasm/api/sqlite3-api-opfs.js
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@ -1216,12 +1216,14 @@ const installOpfsVfs = function callee(options){
sqlite3.oo1.DB.dbCtorHelper.setVfsPostOpenSql(
opfsVfs.pointer,
[
/* Truncate journal mode is faster than delete or wal for
this vfs, per speedtest1. */
"pragma journal_mode=truncate;",
/* Truncate journal mode is faster than delete for
this vfs, per speedtest1. That gap seems to have closed with
Chome version 108 or 109, but "persist" is very roughly 5-6%
faster than truncate in initial tests. */
"pragma journal_mode=persist;",
/* Set a default busy-timeout handler to help OPFS dbs
deal with multi-tab/multi-worker contention. */
"pragma busy_timeout=2000;",
"pragma busy_timeout=3000;",
/*
This vfs benefits hugely from cache on moderate/large
speedtest1 --size 50 and --size 100 workloads. We currently

12
manifest
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@ -1,5 +1,5 @@
C OPFS\sspeedtest1:\shide\sa\scurrently-broken/to-fix\sWASMFS-build\slink.
D 2022-11-29T18:00:01.024
C sqlite3.oo1.OpfsDb:\sdefault\sto\sjournal_mode=persist,\sas\scurrent\stests\sshow\sit\sto\sbe\smarginally\sfaster\sthan\struncate/delete\sin\sChrome\sv109.\sAlso\sincrease\sdefault\sbusy_timeout\sfrom\s2\sseconds\sto\s3,\sadmittedly\son\sa\swhim.
D 2022-11-29T18:28:40.756
F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@ -505,7 +505,7 @@ F ext/wasm/api/pre-js.js b88499dc303c21fc3f55f2c364a0f814f587b60a95784303881169f
F ext/wasm/api/sqlite3-api-cleanup.js ecdc69dbfccfe26146f04799fcfd4a6f5790d46e7e3b9b6e9b0491f92ed8ae34
F ext/wasm/api/sqlite3-api-glue.js 056f44b82c126358a0175e08a892d56fadfce177b0d7a0012502a6acf67ea6d5
F ext/wasm/api/sqlite3-api-oo1.js 06ad2079368e16cb9f182c18cd37bdc3932536856dff4f60582d0ca5f6c491a8
F ext/wasm/api/sqlite3-api-opfs.js ee97811004fd0da9311527293b519543fbb0c6b0c9beaa9b6704400bfd74d150
F ext/wasm/api/sqlite3-api-opfs.js 2f99c9b2c3c0f53bf40153de20db350378deed825ec0d5cf8f449e9e0081f08b
F ext/wasm/api/sqlite3-api-prologue.js 7fce4c6a138ec3d7c285b7c125cee809e6b668d2cb0d2328a1b790b7037765bd
F ext/wasm/api/sqlite3-api-worker1.js e94ba98e44afccfa482874cd9acb325883ade50ed1f9f9526beb9de1711f182f
F ext/wasm/api/sqlite3-license-version-header.js a661182fc93fc2cf212dfd0b987f8e138a3ac98f850b1112e29b5fbdaecc87c3
@ -2064,8 +2064,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
P f64a224244743ab121371abd516fccbfc93c110e0952211764bd1b217e792c1b
R 9e4ddb7294c8c5e99856ae19fd524910
P cde95d382f8debcbca27c4aaf08470ffda35ab10d723a887786669367590ad3c
R f012421262a97adb4d00809196a366a2
U stephan
Z 303f08b9a1a9cd719a67e29d0dc3ab85
Z e12ff5fd260034aa46c1df81ecc7ab20
# Remove this line to create a well-formed Fossil manifest.

2
manifest.uuid
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@ -1 +1 @@
cde95d382f8debcbca27c4aaf08470ffda35ab10d723a887786669367590ad3c
d0c8fa30a31c691bc1be5e98d806eeb1e23a8fc6cd54d87e5c1b720aa936e707